Pavement friction coefficient measuring method based on three dimensions

Abstract

The invention provides a pavement friction coefficient measuring method based on three dimensions. The method comprises the following steps of acquiring planar three-dimensional texture data of a to-be-measured pavement; simulating a tire moving process, and acquiring a contact area between the to-be-measured pavement and a simulated tire tread according to the planar three-dimensional texture data and a preset pavement top surface downward depth; according to the contact area, friction force characterization of the pavement texture being obtained through frequency analysis and contact area section preset division rules, and the friction force characterization of the pavement texture comprising adhesion force response texture features and hysteresis force response texture features; and according to the adhesion force response texture feature, the hysteresis force response texture feature and the road surface friction coefficient relation model, obtaining the road surface friction coefficient of the to-be-measured pavement. Aiming at a problem that a traditional pavement friction coefficient measurement result is easily influenced by rubber performance, water film thickness, temperature, measurement speed, rubber aging and the like, non-contact measurement of the pavement friction coefficient is realized through a more accurate three-dimensional texture characterization method.

Description

technical field [0001] The invention relates to the technical field of road surface friction coefficient measurement, in particular to a three-dimensional-based road surface friction coefficient measurement method. Background technique [0002] The friction between the tire and the road surface is a crucial factor affecting road safety. Road friction is the resistance to relative motion between the tire and the road surface and is caused by a combination of sticking and hysteresis mechanisms. [0003] In the past few decades, dragging tires or rubber mats on roads or samples is still the main method of measuring road skid resistance. This type of measurement method uses direct measurement, including low-speed (static) measurement and high-speed measurement. Among them, typical low-speed measurement equipment includes a pendulum tester (British Pendulum Tester, referred to as BPT) and a dynamic friction tester (Dynamic Friction Tester, referred to as DFT). Both devices use a...

AI Technical Summary

Problems solved by technology

[0004] However, all existing high-speed testing equipment requires consuming water and testing tires to collect road friction data, which measures the friction between the rubber wheel and the wet road surface.

What they all have in common is that they are relatively complex and costly, and current skid resistance measurements are generally performed at the project level

Because a truck with a large water tank is usually required to wet the surface with a defined layer of water, they have a limited range for a single measurement due to the limited amount of water they can carry, and their results are also dependent on the water film thickness, Factors such as temperature, measurement speed, rubber aging, rubber wear and even road surface roughness, all of these factors can make the measurement results difficult to control

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